Filtering element.



No. 812,932. PATENTED FEB. 20, 1906.

K. KIEPER.

FILTBRING ELEMENT.

APPLICATION FILED APR.7,1904.

5 SHEETSSHEET I.

ZU/fnesses 5 w. M

PATENTED FEB; 20, 1905.

K. KIE'FBR. 'FILTERING ELEMENT},

APPLICATION FILED APR. 'i, 1904.

' s S'HBETSSHEET 2.

No. 812,932. PATENTED EBB, 20-, 1906.

K. KIEFER.

PILTERING ELEMENT.

APPLICATION FILED APR.7,1904.

5 SHEETS-SHEET 3.

aaraixxkmA No. 812,932. PATENTED FEB. 20, 1906 K. KIEEEE. FILTBRIN-G ELEMENT.

v APPLICATION FILED APR.7,1904. n 5 SHEETS-SHEET s.

Ilg;

zzf/knessts 5% mvcmar Q. M n v v UNITED sTATEs KARL KIEFER, or CINCINNATI, OHIO.

FILTERING Specification of Letters Patent.

PATENT OFFICE.

E'LEMENTA 'Patented Feb. 20, 1906'.

Application and April 7, 1904. Seria1N o.202,105.

- and inclosed within an air-tig t drum-such, for instance, as are shown in my Patent No.

1 terlayers. Y

I with thereversing-tool inserted. Fig.7s'howsf ment described later..

779,607, January 10, 1905.

The purpose of this invention consists in certain novel constructions that sim lify the construction and operation of such filter elements. I I 1 I It also consists in novel means for revent-- ing the cloudy liquid between the fi lter ele. ments from entering the clear side of the fil- -In the filter elements as shown in my above patent the embedded li uid-conductor is used for the conveyance o the clear liquid, while the separating li uid-conductor isused for the conveyance of t e cloudiyl liquid.

In the drawings, Figure 1 s ows a cross section through the novel liquid-conductor. Fig. 2 shows in detail three of the'novel filter elements, the two lower ones superimposed, the upper one just being lowered. Fig. 3 shows a cross-section through the hydraulic press with cover opened and filled one-half with thin filter mass. Fig. 4 -shows the same hydraulic press with enough mass for twofilter layers inclosing the clear-li uid conductor. Fig. 5 shows the upper part 0 said hydraulic. press with the filter mass in a compressed state. Fig. 6 shows an upper part of said hydraulic ress with two filter layers raised so as to enable them to be taken from the machine a part of the hydraulic pressfth'e filter layers reversed by the reversi'n -tool, the liftingtool inserted ready tota e the filter layers from thepress.

' Fig. 1 shows the liquid-conductor for{ the conveyance of the cloudyliquid, consistingof a coarse-wire screen of, about the diameter of the filter layers, .ha'vin inits center. a metal hub H with a centra aperture. This hub H has flanges Fand F', with whichIit' rigidly grasps the coarse-wire liquid-con'ductor. It has holes 1 and an annularrecess 2 for'the pu ose of insertingthe Iiftinginstruit for short In Fig. 2 the two lower filter elements are superimposed in the condition in which the are to be placed in the filter-drum. It wi 1 be seen that over compression of the filter mass is prevented when the metal parts of .the hubs H come together on line N. It will alsobe seen that when a 'numberof the filter elements with the hubs H are stacked one upon the other they form a continuous main tube or assage for the egress of the clear liquid coll element. lifting instrument is inserted, is bei'n lowered-in place. M is the filtering mass o compressed pul It completely surrounds the two 'screen- 'sks S and S, of which 8 is seen to be of smaller diameter. These screendisks are of very fine mesh, that when using fiber of the which it is generally used for layers it retains the filter fiber.

consistenc in tor. 1 wires to the inch, and it is best to use twilled cloth.

with-compressed paper-pulp is able to drain or supply two filter layers of a diameter of twenty four inches each at the ordinary speed of'filtration. I have, however, added a second fiber-retaining matv S to'the first one, for when "the liquid moves toward the center the conduits are diminished, especially in the center, where the compressed pulp is fine enough so I Lime found that a single wire mat of the vkind specified when completely surrounded cted from each independent filter The up er one, into which the 9 packing lter Iam calling fiber-retaining liquid-cond'uc- .The meshes .are about thirty to fifty.

compressed more thanany other lace. and a double mat will afford a freer out et for the 1 liquid. These fiber-retaining mats/are pliable and elastic, and in order-to be. able to transport same the are carried by the .liquidconductor for the c oudy liquid. (Illustrated in detail in Fig. 1.) I .It-will be seen in the filtering layer over theflanges' F is'more They"act"as a-gasket to. revent sideI'of' the- Fig. 2 that thecenterof 1 I O0 -compressed, thanthe-rest ofthe mass, T This; 'isiind'icated'by closer graining. Th'eseparts', .comefin close'contactjwhen superimposed- :with theflanges F .and- F.-';of the cfcyndrl cztor. I I :the'cloudyli uid fr'om'gettlng intot e clear filterf jWhen' su pe'rim fosed it.

will be'seen, F ig. .2, lo'wer part, that. t .-fiber'-.

retaining mats are communicatin ith 'the holes of-hub H. and there with t central i11 4 hole in the hub, which iafor th'e outletaf the ..;0 earli q'uid'. ,I f the center partof ,t'hcffilter.

layers contact with the flanges F and F were notcompressed, ve ry much ofjthe cloudyiliquidic'ouldilcreep along the metal flanges and passthrough the holes l-into the .clearside of, the filter. lhave found in orderto'enab'le filtration under pressurev that the v -filtering layer M'should-be compressed-at the center .to about from twoto our times as 1 'denselyjas:the}rest of the filtering mass in or- Io der to make secure connection against the exit .of the cloudy liquid. 1, 'have'besides ffproyide d theflanges with grooves 3, as. is.

fcommonl done ongasket-seats, inorder to v I a further struct the cloudy liquid from passtermg medium.

ing 1 between the metal flanges F and the fil- T'T 'I remark here that when filtering with low pressure the filter mass need not be com- 1 pressed as much. I It 'erhaps need be com- .j. that the'h'ydraulic ress'urewithin the liquidto befiltered should pressed buttwofold. he rule, therefore, is

not be any greater upon the s 'uare inch of the filtering medium oppof sitet e'flan' es F than the pressure previ- 'Qthat'part. It isbetter, however, to comously exerte up'onthe" filtermgmedium at ressit morewhen building up the filter ayer'fthan not enough, Then one is sure that no cloudyliquid .will pass into the clear layer in contact wit the anges F and F.

side by compressin the arts of the'filter How the filtering medium, as shown inFig. 2,1s' produced in connection and conjunction v :.with the iiilet and outlet liquid-conductors I v will'proceed to describe. I

-Flg; 3 shows a hydraulic-press which is .j atented to mein'my Patent No. 797,122,

..inder ;be actuated by fluid controlled by valve V.

tom-B, swinging and erforatedto T, cent er G,"in ,w moves a piston P, that can In order to produce the filter layer M, I fill 'the'large cylinder C, Fig. ,3, about half-full. Iwiththe thin liquid pulp,

thin enough to distribute itself 'fairl'y even. The thinnerthe 1 it close 7 S andSf These liquidrconduc'torsare ver As quickl as cylinder mFig. 4, and close theto coverT. I now .cause, by-means of the 'valv is used the morep'erfect the filter layer uctorsS and S in being of such diameter that terior c'lylinder center hole within the mats light andreadily lie on the liquid filter mass. ssible I fill up the rest of the wit the filtering mass, as shown lic piston P to rise, which being rigid y conneeted with the perforated bottom B causes the latter to also ascend within the cylinder as shown in Fig. 5.

Q, compressing the water'out ofth'e pulp untllthe filter layer; presents the appearance which is embe be afterward. Hereu o'ii I place the two fiber-retaining liquid-con I inverted order 1115011. the filtering mass, the ine V, the h drau- 7 I will now describe how the center arts of I the filter mass are more compressed t an the rest of the filter layer. This is made possible in one o eration by the fibrous nature of the fiber-pulp and by pressing out the water in two opposite directions onlynamely, top and bottom. If the filtering-pulp was an absolute plastic material, the result would be a perfect homogeneous pulp la er. Now the plasticity of the filteringu p is lost with moisture, and while'it is sti compressible up to dryness itis not ductile; lnthe position shown in Fig. 5 the fibers around the center cannot escape from their place under a high ressure, as would be the case with aperiectly ductile material, but have to remain at their places. By pressiri the Water onlyintwo opposite directions I cap the fiber in a horizontally relative position of rest Within the ulp layer, and a more homogeneous filter ayer is the result, while otherwise if I,

"for instance, were to extract the water from the sides ofthe cylinder the fiber would move in radial directions, following the Water, and the result would be an im erfect layer.

The next 0 eration t e filter layer, in tilled the'mats S and S, has to undergo is that of raising it outof the cylinder C, Fig. 6, and placing on it the cloudyliquid-conductor in an inverted condition,

I and if properly proportioned, the flanges F and, F

exactly fit into the more compressed circular parts around the center of the filter layers. In order to lift the filter layer away, I have to lift the perforated screen B with it, as otherwise the compressed fitter mass M would fall oil? This may be done by the lifting-arm 0;, having'hook 4t and lock-nut 5, and finger 6. This liftin -arm 0 swings over the filter elements;ias s own inros Fig. 6. Tlieg-hook 4 is introducedinto the center. hole and-then turned one-half a turn,

whereby the finger '6 takes hold under the perforated rbottom late-B. By ti htening the lock-nut 5 the h lter layer, with bottom --plate 3, can be tightened to-the lifting-arm,

whereupon the lifting-arm Ois swung back again one hundred and eighty degrees, which gives the position as shown in Fig; 7. Hook din Fig. 7 is then released and dropped.

The perforated plate B, that is not needed any more, is put backwhere it originally was, and the filtering elements, comprising the filtering mass M, mats S and S, and the cloudy-liquid conductor carrying the filter mass, may then be removed by inserting within thecentral aperture ol the liquid-conductor the lifting instrument ll. 1

It will be'seen that the lifting instrumehh-Liv is parebolically shaped on the lower endwhich serves for guiding the filter 'eloin m. Fig. 2, in the act of lowering it upon another one in order to center same properly.

-What I claim, and desire to secure-by-Let ters Patent.'is- 4 H conductor havinga central hub with central 1. In a filter, the combination of two filter layers of compressed pulp, interposed between them a circular inlet liquid-way with a central ring-shaped compression body having two horizontal compression surfaces,

whereby the filter layers where in contact therewith are more compressed 'thamelsewhere, means for supplyin unfiltered liquid to the inlet-liquid-wav an draining the fil L tered liquid from the filter layers.

2'. In a filter a portable filter element consisting of a supporting circular inlet liquid.-

hole for the clear liquid, in combination with two filter layers of compressed fibrous pulp drained by a circular flat outlet liquid-conductor, said filter layers and. liquid-conductor having central openings registering porting li%uid-conductor. In a with the. central hole of. the supporting inlet liquid-conductor, and admittin of the introduction of means for taking he (1 of the-sup- 3. lter an inlet liquid-conductor consisting of a single circular and stiff manufac-,

ture adapted to conduct liquid radially t two filter layers of compressed fibrous pulp in contact on both sides of said disk, and having a central compression body with imprvious ring-shaped surfaces compressing the filter layers at their point of contact with said surfaces more densely than" the rest of said filter layers.

4. In a filter, the combination of two filter layers of compressed pulp, interposed between them a circular inlet liquid-way with a central ring-shaped compression body having two horizontal compression surfaces,

whereby the filter layers where in contact therewith are practically compressed to=nonporosity, means for supplying unfiltered liquid to the inlet liquid-way and draining the filtered liquid from the filter layers.v

5. Ina filter an inlet liquid-conductor supplying two filter layers and consisting1 ofa single open-work-disk with a ring-s aped compression body in its center, said com- W pression body having horizontal ring-shaped layers of compressed fibrous pul faces, and vertical annulus, formin when superposed with the neighboring liquid-conductors, an intercommunicating opem'n for the clear liquid, in combination with ter supplied by said inlet liquid-conductors, air with outlet wlnch ductor, of an outlet 7 In a filter the combination with an inlet "liquid-conductor supplying two filter layers,

having a central compression body and a verpressed fibrous pulp having depressions to correspond with the compression body mentical central annulus, of filter layers of comtioned, of an outlet liquid-conductor between two filter layers with a central opening to correspond and to center itself with the vertical annulus of the inlet li uid-conductor, and of means for supplying file inlet liquid conductors with cloudy liquid and draining the outletliquid-conductors.

filter elements each consistingyof an inlet liquid-conductor (supplying two filter layers) of-coarse-wire screen havin a central compression body considerably t 'cker than said iquid-conductor and having a central opening for the clear li body, of a pair of respond with,the upper half of the compression body of the su porting inlet liquid-con ductor, the upper ter layer havin a similar depression to correspond with the ower half of the com ression body-of the neighboring inlet liqui -conductor, of an outlet liquidconductor betweenthe two filter layers with outlet facilities between two compression bodies of neighboring inlet liquid-conductors and connecting with the central intercommunicating opening formed by all com ression bodies, and with means for supp yin the inlet liquid-conductors with cloudy liqui and draining the outlet liquid-conductors.

uid in said com ression,

ter layers, the ,ower of having a circular depression to cor- 8.- In a filter the combination of a series of 9. In a'filter the combination of a series of filter elements each consisting, of an inlet liquid-conductor (supplying two filter layers) of a sin 1e open-work manufacture havin opening for the clear liqui of apair of filter layers, the lower of which having a circular de ression to correspond with the upper ha f of the compression body of the su porting inlet liquid-conductor, the upper lter layer having a similar depression to cor,- respond with the lower half of the compression body of the nei hboring inlet liquid-coniquid-conductor between the two filter layers with outlet facilities between two compression bodies of neighboring inlet liquid-conductors and connecting with the central intercommunic'ating open mgs formed by all compression bodies; and with means for supply ng the inlet liquidconductors with cloudy liquid and draining the outlet li uid-conductors.

'10. In a ter layers of compressed pulp, a circular inlet liquid-way interposed between them with an annular-ring-shaped compression body having two compression-surfaces, whereb the filter layers where in contact therewit are more compressed thanelsewhere, means for ter, the combination of two fil- I05 a centra compression bod with a central I. supplying unfiltered li uid to the inlet liquid- 'facture, interposed between and supplying way and draining the tered liquid from the filter layers; v 5

'11 In a filter, the combination of two fil-' ter layers of com ressed' fibrous pulip of a circular inlet liqui -conductor,'ofr1 manuthem,. a central compression body with im- 7 pervious ring-shaped surfaces connected layers, a central compression'body and vertical central annulus, of filter layers of-c0m- Pressed fibrous. pnlp, parts of which filter,

ayers are in intimate contact with the compression body mentioned; of an outlet 1i indconductor, between and draining two lter "layers,' said liquid-conductor. having a cene,

' to correspond and to'center itself with t e' verticalannulus of-the inlet tral openin liquid conductor, and of means for sup lying the inlet liquid-conductors with clon y liq L-f. uid, and draining the-outlet li uid-conductors." In testimony whereof I name to this specification in the presence of two subscribing witnesses. .v

U a KARL KIEFER. Witnesses:

G. .W. WERDEN, H. L. RAMBEAU.

ave signed my"v 

